I have something made by g4tph of similar construction to the alpha loop I think.

I was not too impressed.  I think the bolted together sections create extra resistance in the loop.

I will send you a pdf article on mag loops.  resistances of tenths of ohms is to be avoided.

it may take me a couple of days to run it down.

Gary Lee
[log in to unmask]



On Apr 27, 2014, at 2:54 PM, Ron Miller <[log in to unmask]> wrote:

> Woo hoo, Gary. You've topped all of the qrp posts I've submitted to this
> list with just one post! I've got to try that, when I get a loop.
> 
> The other loop manufacturer I'm checking into is Alpha Delta. I don't know
> much about them yet, but they are an American company and their loop sells
> for about a third of Alex's, loop, without a tripod included.
> 
> 
> 
> Ron Miller
> 
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Gary Lee
> Sent: Sunday, April 27, 2014 12:47 PM
> To: [log in to unmask]
> Subject: Re: Alex Loop
> 
> For Eric:
> 
> wicj mfj box are you speaking of?
> 
> for the rest of the list,
> I have an alexloop and for portable work it is nice.  very efficient, = but
> like all magnetic loops, very narrow band.  It must be retuned about = every
> 5 kc.  To tune, turn off AGC and tune for max noise.  That will = get you
> close enough.
> For more general info, go to the alexloop web site.  He has many = articles
> on magnetic loop construction.
> 
> I have checked into the blind hams 20 meter net using the alex loop from =
> inside my living room running ten watts with my elecraft kx3.
> 
> Gary Lee
> [log in to unmask]
> 
> 
> 
> On Apr 27, 2014, at 12:23 PM, Eric Clegg <[log in to unmask]> wrote:
> 
>> There are two Alex loops available.
>> =20
>> One for $129 that is made of copper tubing and the ends of the tubing 
>> =
> have
>> to be soldered onto the loops tuing box.
>> =20
>> The other one is priced at over $300 with shipping from Brazil.
>> =20
>> It is made of coax and comes with a travel bag.
>> =20
>> I currently own both of them and yes they can be tuned by ear.
>> =20
>> I also plan to try and use the MFJ tuing box to put between the rig =
> and the
>> loop to see how easy it is to find a null.
>> =20
>> This box is made to use to tune a manual antenna tuner.
>> =20
>> There are two other loops available.
>> =20
>> One from a place called the Radio S
>> tore in Missouri. It also sells for $300 and comes with a bag and =
> tripod.
>> =20
>> The other loop which is very portalbe comes from Martin Lynch and Sons 
>> =
> in
>> England.
>> =20
>> It is priced at around $38.
>> =20
>> It can be hooked directly to the back of a Yaesu FT817ND or some other 
>> =
> qrp
>> rig.
>> =20
>> The loop from missouri has gotten great reviews on eham.
>> =20
>> Hoe this helps,
>> =20
>> Eric Clegg
>> KU3I